What is the Greatest Common Factor of 39805 and 39820?

Greatest common factor (GCF) of 39805 and 39820 is 5.

GCF(39805,39820) = 5

We will now calculate the prime factors of 39805 and 39820, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 39805 and 39820.

How to find the GCF of 39805 and 39820?

We will first find the prime factorization of 39805 and 39820. After we will calculate the factors of 39805 and 39820 and find the biggest common factor number .

Step-1: Prime Factorization of 39805

Prime factors of 39805 are 5, 19, 419. Prime factorization of 39805 in exponential form is:

39805 = 5¹ × 19¹ × 419¹

Step-2: Prime Factorization of 39820

Prime factors of 39820 are 2, 5, 11, 181. Prime factorization of 39820 in exponential form is:

39820 = 2² × 5¹ × 11¹ × 181¹

Step-3: Factors of 39805

List of positive integer factors of 39805 that divides 39805 without a remainder.

1, 5, 19, 95, 419, 2095, 7961

Step-4: Factors of 39820

List of positive integer factors of 39820 that divides 39805 without a remainder.

1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 181, 220, 362, 724, 905, 1810, 1991, 3620, 3982, 7964, 9955, 19910

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 39805 and 39820. The biggest common factor number is the GCF number.
So the greatest common factor 39805 and 39820 is 5.

Also check out the Least Common Multiple of 39805 and 39820